Hire the Best Spring Boot Freelancers
in Bangladesh

OCJP Certified Java Architect | Spring Boot | Microservices | AWS | Kafka | Camunda | 13+ Years Experience With 13+ years of professional experience in designing, developing, and deploying enterprise-grade applications, I help businesses build scalable, secure, and high-performance cloud-native solutions. My expertise spans Java, Spring Boot, Microservices Architecture, AWS Cloud, Kafka, Redis, Docker, Kubernetes, CI/CD, OAuth2, Keycloak, JWT, and Camunda BPM. Key Highlights: ✔ OCJP Certified Java Professional ✔ 12+ Years of Software Development Experience ✔ Microservices & Cloud-Native Architecture Specialist ✔ Banking & FinTech Domain Expertise ✔ RESTful APIs, Event-Driven Systems, and Distributed Architecture ✔ AWS Cloud Deployment & DevOps Automation ✔ Security Implementation with OAuth2, JWT, Keycloak, LDAP, and Okta Recent Accomplishments: ✅ Designed and implemented cloud-native microservices using Java, Spring Boot, Spring Cloud, Docker, and Kubernetes. ✅ Built FinTech and Banking solutions integrating payment gateways and remittance platforms, including Stripe, RIA, and Instant Cash Exchange House APIs. ✅ Developed high-performance event-driven architectures using Kafka and Redis for real-time processing and scalability. ✅ Automated deployment pipelines using Jenkins, Docker, Kubernetes, SonarQube, and Git-based CI/CD workflows. ✅ Implemented workflow orchestration and business process automation using Camunda BPM. AI-Assisted Development: I effectively leverage AI tools such as ChatGPT and GitHub Copilot to accelerate development productivity by 60–80% through: • Business rule analysis and API design • Schema and ORM modeling • Rapid endpoint generation • Code completion and refactoring • Automated code reviews and quality improvements • Technical documentation generation Core Technologies: • Java, Spring Boot, Spring Framework, Spring Cloud, Hibernate, JPA, Camunda, GraphQL, WebSockets • Kafka, RabbitMQ, Redis, Docker, Kubernetes • MySQL, Oracle, PostgreSQL, MongoDB, Elasticsearch • AWS (EC2, ECS, RDS, S3, IAM, SQS) • OAuth2, JWT, Keycloak, LDAP, Okta, Spring Security • React, Angular, TypeScript, JavaScript • Jenkins, Git, Maven, SonarQube, Jira I am passionate about building reliable, scalable, and secure enterprise solutions that deliver measurable business value. Let's discuss how I can help your team accelerate development, modernize architecture, and successfully deliver high-quality software solutions.

With over 14 years of experience in software engineering, I specialize in designing and delivering robust back-end and full-stack solutions for the fintech, banking, and process mining sectors. I bridge the gap between complex business requirements and highly scalable, cloud-native architecture. Whether you need to migrate legacy systems to microservices, ensure strict financial compliance, or build full-stack platforms from the ground up, I bring the technical depth and leadership required to get it done right the first time. My Core Technical Expertise: Backend & Architecture: Java/J2EE, Spring Boot, Microservices, Spring Security, REST API, Open API, and JPA. (EJB Certified). Cloud & Containerization: AWS Certified (SAA, DVA, CloudOps), Docker, and Kubernetes. AI & Next-Gen Tooling: OpenAI, Spring AI, and MCP (Model Context Protocol). Frontend Integration: ReactJs, ZK UI. Databases & Observability: Oracle, MySQL, Grafana, and Prometheus. Domain Expertise: Process Mining, Core Banking, and Financial integrations. Why Partner With Me? Enterprise-Scale Impact: I have spearheaded mission-critical banking automation for over 1,700 bank branches and modernized massive monolithic systems into scalable microservices. Engineering Leadership: Deep experience in Agile/Scrum environments. I regularly lead teams to deliver complex projects on tight deadlines while maintaining strict code quality. Proven Remote Reliability: I have a decade of experience driving complex projects to completion while collaborating seamlessly with globally distributed teams across Australia, Europe, and South America.

Hi! I’m Md. Saddam Hossen, a results-oriented Full Stack Developer with 5+ years of experience building scalable, secure, and high-performance web applications. I specialize in Java Spring Boot, React, Angular, and cloud deployment using AWS and Docker. I’ve developed and deployed multiple full-stack systems and enterprise applications, optimized for performance, reliability, and maintainability. My work consistently reduces latency, improves database efficiency, enhances UX using modern UI frameworks, and ensures quality with thorough QA and testing practices. 🚀 What I Offer: ✅ Full Stack Web App Development (React/Angular + Spring Boot) ✅ Backend Microservices with REST APIs (Java, Spring Boot, Kafka, Redis, RabbitMQ) ✅ Frontend SPAs with React, Angular, Bootstrap, Tailwind CSS ✅ Cloud Deployment on AWS EC2, Digital Ocean using Docker & Kubernetes ✅ CI/CD Pipelines with Jenkins & GitLab CI/CD ✅ Secure Auth with JWT & Role-Based Access Control ✅ PostgreSQL, MongoDB, MySQL – Design, Optimization, Query Tuning ✅ QA & Testing – JUnit, Postman, Manual Testing, Debugging 🏗️ Projects I've Built: ✅ Device Management System – Inventory, Warranty & Service Tracking ✅ Attendance Tracker – Role-based dashboard with JWT-secured REST APIs ✅ Training Platform – Admin/Student Modules, Feedback System 🔗 Live apps & source code in portfolio below. 🛠️ Tech Stack: Java, Spring Boot, React.js, Angular, MongoDB, MySQL, PostgreSQL, Docker, AWS, Jenkins, Kafka, RabbitMQ, Redis, GitLab CI/CD, WebSockets, Thymeleaf, Tailwind CSS, JUnit, Postman 🎓 Education & Certifications: ✅ BSc in Computer Science & Engineering, MBSTU (2023) ✅ AWS Cloud Practitioner (In Progress) ✅ Responsive Web Design – freeCodeCamp Let’s build something scalable and modern! I’m here to help you turn ideas into working products with clean code, secure architecture, and real business value. 📬 Message me today to get started!

I build reliable Java and Spring Boot backends — REST APIs, database-driven applications, and integrations with external services. As a professional Java developer with 4+ years of industry experience, I focus on backend systems where correct data handling, maintainable architecture, and reliable API behavior matter. ### What I can help you with ✓ **Java & Spring Boot Backend Development** Build new backend features, REST APIs, business logic, and database-backed services using Java and Spring Boot. ✓ **REST API Development** Design and implement clean REST endpoints with validation, structured error handling, authentication, and clear API documentation. ✓ **Third-Party API Integration** Integrate external APIs into your backend, process and transform responses, handle duplicate data, and persist results reliably. ✓ **PostgreSQL & MySQL** Design relational schemas, model relationships, write queries, and integrate databases using JPA/Hibernate. ✓ **Spring Security & Authentication** Implement authentication and authorization for Spring Boot applications, including JWT-based security and role-based access control. ✓ **Existing Backend Maintenance** Debug Spring Boot applications, fix API/database issues, refactor backend code, and extend existing systems without unnecessarily rewriting them. ### Technologies I work with **Backend:** Java, Spring Boot, Spring Framework, Spring Security **Database:** PostgreSQL, MySQL, Oracle **Persistence:** JPA, Hibernate **API:** REST, JSON, Swagger / OpenAPI, Postman **Build & Version Control:** Maven, Gradle, Git I care about understanding the requirements before implementation — especially the data model, API contracts, validation rules, security requirements, and edge cases that can become expensive problems later. If you have a Spring Boot backend to build, integrate, debug, or extend, send me the requirements or describe the problem. I can review it and explain how I'd approach it before we start.

Hi there! I'm a Computer Science graduate with over 9 years of hands-on experience building software that actually works — cleanly written, well-tested, and delivered on time. I've worked with clients across Upwork and Elance on a wide range of projects, from web applications and backend systems to mobile apps and database-driven solutions. Whether you need a full product built from scratch or a tricky bug squashed, I bring the same level of care and attention to every task. A few things that set me apart: * I'm a competitive programmer — I've solved 420+ problems on UVA Online Judge and participated in ICPC contests (2012, 2013, 2014). This means I don't just write code; I think through problems carefully before I write a single line. * I'm available 24/7 and communicate clearly throughout a project, so you're never left wondering where things stand. * Every project comes with 14 days of free post-delivery support, because I care about the outcome, not just the handoff. What I can help you with: *Backend & API development (Java, Spring Boot, Spring Webflux) *Web design & development (HTML, CSS, JavaScript, JSP) *Android app development *Database design & management (MySQL, Oracle, SQLite) *Reporting & templates (Jasper iReport) *Bug fixing, code review, and optimization I take pride in writing clean, maintainable code and keeping my clients in the loop every step of the way. If you have a project in mind — big or small — I'd love to hear about it. Let's build something great together.

🏆 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: 𝗝𝗮𝘃𝗮, 𝗦𝗽𝗿𝗶𝗻𝗴 𝗕𝗼𝗼𝘁 - 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: 𝗔𝗻𝗴𝘂𝗹𝗮𝗿 🏆 𝗧𝗼𝗽 Rated & All 𝗙𝗶𝘃𝗲 ⭐️ Review 🏆 𝟗5𝟎+ 𝐇𝐨𝐮𝐫𝐬 𝐂𝐨𝐦𝐩𝐥𝐞𝐭𝐞𝐝 🎯 𝐀𝐜𝐭𝐢𝐯𝐞𝐥𝐲 𝐬𝐞𝐞𝐤𝐢𝐧𝐠 𝐟𝐮𝐥𝐥-𝐭𝐢𝐦𝐞 𝐨𝐩𝐩𝐨𝐫𝐭𝐮𝐧𝐢𝐭𝐢𝐞𝐬 Greetings! I’m a 𝗦𝗲𝗻𝗶𝗼𝗿 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 with 5+ years of industrial hands-on experience working on robust, enterprise-level, and SaaS applications. I bring a wealth of skills to develop efficient and scalable applications according to your needs. Bring your web application ideas to life with a skilled Full Stack developer you can trust. 📌 SKILLS 💡 Programming Language: Java, Typescript, JavaScript 💡 Frameworks: Spring Boot, Angular 💡 UI/UX: Material UI, Tailwind CSS, Bootstrap, Reactive Forms, ApexChart, HighChart 💡 APIs & AuthN: RESTful, OAuth2, JWT 💡 Architecture: Microservice, Monolithic 💡 Deployment: Multi-tenant SaaS 💡 DB: PostgreSQL, Oracle, MySQL, MS SQL 💡 ORM: JPA, Hibernate 💡 VCS: Git, GitHub, GitLab 💡 CI/CD: Docker, Jenkins, GitHub Workflow 💡 Tools: Azure DevOps, ZOHO, Redmine 💡 Methodologies: Agile, Scrum I'm open to full-time, long-term collaboration. feel free to reach out, always happy to connect and contribute.